Assigjvob of oxe-half



H. T. FIELD.

MOVEMENT INDIGATOR.

(No Model.)

PatentedJan. 13,1885.

Witness es UNITED STATES PATENT OFFICE.

HORACE T. FIELD, OF BOSTON, MASSACHUSETTS, ASSIGNOR OF ONE-HALF TO OALEB XV. HODGDON, OF SAME PLACE.

MOVEMENT-INDICATO?.

SPECIFICATION forming part of Letters Patent No. 310,860, dated January 13, 1885.

(No model.)

To all whom it may concer/1,

Be it known that I, HORACE T. FIELD, of Boston, in the county of Suffolk` and State of Massachusetts, have invented a new and useful Improvement in Movement- Indicators,

which will, in connection with the accompanying drawings, be hereinafter fully described, and specifically deiined in theappended claims.

This invention relates to that class of mai@ chines which are employed to record, by indieation upon a dial, the number of revolutions or other operative moyements made by a working machine to which my invention is attached, for the purpose of such ascertaining of the number of its movements; and it consists in the construction and combination of the divers devices embodied therein, as will, in connection with the accompanying drawings, be hereinafter more particularly and fully set forth and claimed.

In said drawings, Figure 1 is a top or plan view of an indicating machine embodying` my invention, the dial and indicating hands being omitted. Fig. 2 is a vertical section taken on line z z, Fig. 1. Fig. 3 is a detached sectional elevation, the section being taken as on line x x, Fig. 1, and the elevation as viewed from the left in that ligure. Fig. 4L isa detached elevation showing the dial with the hands in relative position thereto. Figs. 5

and 6 are detached sections illustrating detents which may be employed to positively drive the hand-carrying arbors in one direction, and to allow said arbors to b e independently rotated in the opposite direction in order to bring the several hands to the initial or starting point on the dial.

In said views, A A represent the i'rame, which may be of any desired size and shape 4o to adapt it to the specic position it is to occupy. The arbors l 2 3 are jonrnaled in suitable bearings secured to or formed in said frame, said arbor 1 being, by any suitable means or method, connected with the machine whose movements are to be recorded and indicated, so that such movements will be coineidentl y or diii'erentially communicated to said arbor. A pinion, 4,' is secured on said arbor 1, and meshes with a gear-wheel, 5, secured on a short lower arbor, 6, which carries a pinion, 7, that meshes with gear-wheel S, secured on arbor 2, and a pinion, 9, also secured on arbor 2, meshes with gear-wheel 10, 'secured on arbor 3. In practice it is found preferable to form each of said pinions with 5 onetenth the number oi' teeth of the irrespective meshing gear-wheels, and as said pinions and gear-wheels are respectively uniform in number of their teeth, therefore arbor 1 will make ten revolutions to a single revolution of short arbor 6, and one hundred revolutions to one of arbor 2, and one thousand revolutions to one of arbor 3, while arbor 2 will perform ten revolutions to one of arbor 3. Upon each of the arbors l 2 3 is secured an endless screw, 11, which respectively mesh with the tangent-wheels 12, which have each one hundred teeth, and are mounted upon arbor 13 in the manner next to be described. A i'langed hub, 14, is rigidly secured to said arbor 13, and upon this hub is loosely mounted the tangent-wheel 12, which is engaged and actuated by the endless screw carried by arbor 1, said tangent-wheel being frictionally engaged with its said hub by means of disk 15, spring 17, and screw-nut 16, threaded on said hub, and by which such friction is exerted on said tangent-wheel as to insure the rotation of arbor 13 coincidently with thetangent-wheel when the latter is driven by its engaging-screw 11. On said arbor 13 is arranged t-he indicating-hand 20, which traverses the face of dial 23. The tangent-wheel which is engaged by screw 1l, carried by arbor 2, is mounted on hub 18, which is loosely mounted on interior arbor, 13, this tangentwheel being held frictionally against the flange of the hub by a disk, spring, and nut, in the same manner as j ust described with reference to the tangent-wheel driven by arbor 1. A 9o sleeve-like portion of hub 18 extends to hand 20 of the interior arbor, 18, and carries a hand, 21, as shown. The tangent-wheel12, which is engaged and driven by the endless screw 1lA on arbor 3, is mounted and secured 95 on hub 19, (which revolves loosely on the sleeve of hub 18,) in the same manner as those previously described, and carries a hand, 22.

(Shown in section in Fig. 2 and in elevation in Fig. 4t.) The dial 23 is primarily divided into one hundred spaces, which are by longer and shorter indicating-marks divided into spaces embracing, respectively, five and ten ot' said primal spaces. As each revolution of arbor 1 will, by the engagement of its screw 11, move the meshing wheel 12 one tooth, therefore one hundred revolutions of arbor 1 will carry hand 20, secured on arbor 13, once around dial 23, during which period arbor 2will have'performed one revolution, and will, through its screw 11, tangent-wheel 12, and hub 1S, have moved hand 2l one primal space on the dial; and when arbor 1 shall have performed one thousand revolutions, arbor 2 having performed ten revolutions, arbor 3 will have performed one revolution, and will of course have moved hand 22 oneprimal space on the dial. lt will thus be clear that when hand 22 has performed the circuit of the dial it will indicate one hundred thousand revolutions of arbor 1.

It will be obvious that by increasing` the number of the worm carrying arbors, their multiplying-gears, and corresponding tangentwheels, with indicating-hands thereby actuated, the indicating capacity of my machine maybe extended to any desired limit; but for all ordinary purposes the machine as shown has a capacity equal to what convenience will require.

In ordcrthat all the hands may be arranged at the initial point on the dial at any time when desired without disconnecting` the endless screws 11 from their respective tangentwheels 12 by merely actuating the central arbor, 13, a series ot'spring-detents, 24, Figs. 5, (5, may be respectively mounted on the hubs that carry said tangent -wheels, and .may be so beveled or eu't away at one side of their engaging -points as to be respectively disengaged by the rotation ot' the tangent-wheels when driven by the described gearing, but

when turned in the opposite direction by actuating said central arbor, each detent will cngage and carry forward the hub on which it is ailiXed, whereby all the hands will be brought to the same point on the dial, and yet'each be moved independently ofthe other when moving in the opposite direction in the performance of their allotted functions.

As illustrating the reading ot' the numbers indicated by the hands on the dial, reference is made to Fig. 4, where hand 2O (which is actuated from arbor 1) is shown at the starting or initial point. Hand 21 (which is act-uated froni arbor 2) is shown at mark 50, or half the circuit of the dial, and hand 22 (which is actuated i'ron'i arbor 3) is shown at 25, or one-quarter the circuit of the dial; and as hand 22 moves one space at each ten revolutions ot hand 20 and one space while hand 2l traverses ten spaces on the dial, it is therefore shown that hand 2l has been twice and one-half times around the dial, and that hand 20 has been two hundred and iil'ty times around it; and as it requires one hundred revolutions of arbor 1 to carry hand 2O once around the dial, therefore said arbor 1 has made twentyiive thousand revolutions while hand 22 has traversed twenty-tive spaces thereon, and that one hundred revolutions ot` arbor 1 will carry hand 22 around the dial. y

I claim as my invention- 1. In a movement-indicator, the combination ol" a series oi" arbors, as 1 2 3, dill-erentially geared together, with endless screws secured upon and actuated by said arbors, a series of tangent-wheels engaged and rotated by said screws, and respectively mounted upon independent axes having a common center, and each having an independent and differentiated movement, as controlled by its actuating-screw, an indicating-hand attached to and carried by the axis of each ot' said tangentwheels, anda dial spaced and numbered to cooperate with and indicate the respective movements ol'l said hands, substantially as speciiied.

2. In a movement-indicaton the combination ol a series ol" arbors, as 1 2 3, differentially geared together, as specified, endless screws 1l, secured on said arbors, tangentwhecls12, enga ged and rotated by said screws, and respectively and independently mounted on hubs 14 1S 1S), axially arranged on arbor 13, the respective hands arranged on said arbor 13 and hubs 18 1), and a dial, 23, spaced, numbered, and arranged to indicate the rcspective movements of said hands as actuated by said gearing, substantially as specified.

HORACE T. FIELD.

Witnesses:

T. W. Poitrine, EUGENE HUMrnnnY.

IOO 

